Cellulose resin composition, molded body and product using same

Abstract

A cellulose resin composition comprising a cellulose derivative and a lubricant, wherein the cellulose derivative is an acylated cellulose obtained by substituting at least a part of hydrogen atoms of hydroxy groups of a cellulose with an acyl group having 2 to 4 carbon atoms, and the content of the lubricant is in the range of 0.1 to 10% by mass. A cellulose resin composition capable of forming a molded body having a high-quality appearance and scratch resistance is provided.

The invention claimed is: 
     
       1. A cellulose resin composition, comprising:
 a cellulose derivative (A), 
 a lubricant (B), and 
 a plasticizing component (C), 
 wherein the cellulose derivative (A) is an acylated cellulose obtained by substituting at least a part of hydrogen atoms of hydroxy groups of a cellulose with an acyl group having 2 to 4 carbon atoms, and remaining hydrogen atoms of the hydroxy groups of the cellulose are unsubstituted, 
 a content of the lubricant (B) is in a range of 0.1 to 10% by mass, 
 the plasticizing component (C) comprises an aliphatic polyester, and 
 a content of the aliphatic polyester is in a range of 7 to 30 parts by mass with respect to 100 parts by mass of the cellulose derivative (A). 
 
     
     
       2. The cellulose resin composition according to  claim 1 , wherein the lubricant (B) is at least one selected from the group consisting of a fatty acid metal salt, a fatty acid amide lubricant, an aliphatic urea compound, a silicone-based lubricant, and a fatty acid ester lubricant. 
     
     
       3. The cellulose resin composition according to  claim 1 , wherein the lubricant (B) is at least one fatty acid metal salt selected from the group consisting of calcium stearate, zinc stearate, magnesium stearate, aluminum monostearate, aluminum distearate, aluminum tristearate, and zinc laurate. 
     
     
       4. The cellulose resin composition according to  claim 3 , wherein the fatty acid metal salt is calcium stearate. 
     
     
       5. The cellulose resin composition according to  claim 1 , further comprising a colorant. 
     
     
       6. The cellulose resin composition according to  claim 5 , wherein the colorant comprises a carbon black, and a content of the carbon black is in a range of 0.05 to 5% by mass. 
     
     
       7. The cellulose resin composition according to  claim 5 , wherein the colorant comprises a carbon black, and a content of the carbon black is in a range of 0.05 to 0.3% by mass. 
     
     
       8. A molded body comprising the cellulose resin composition according to  claim 1 . 
     
     
       9. A product comprising the molded body according to  claim 8 . 
     
     
       10. The cellulose resin composition according to  claim 1 , wherein the lubricant (B) comprises a fatty acid metal salt, and a content of the fatty acid metal salt is in a range of 0.5 to 6% by mass. 
     
     
       11. The cellulose resin composition according to  claim 1 , wherein the aliphatic polyester is polybutylene succinate. 
     
     
       12. The cellulose resin composition according to  claim 1 , wherein in the cellulose derivative (A), a degree of substitution of the acyl group is 2.0 or more. 
     
     
       13. The cellulose resin composition according to  claim 1 , wherein the cellulose derivative (A) has at least propionyl group as the acyl group, and a degree of substitution of the propionyl group is 2.0 or more. 
     
     
       14. The cellulose resin composition according to  claim 1 , wherein the total amount of the cellulose derivative (A), the lubricant (B), and the plasticizing component (C) is in a range of 90 to 100% by mass with respect to the entire cellulose resin composition. 
     
     
       15. The cellulose resin composition according to  claim 1 , wherein the cellulose derivative (A) comprises acetyl group and propionyl group as the acyl group,
 a degree of substitution of acetyl group is in a range of 0.05 to 0.5, and 
 a degree of substitution of propionyl group is in a range of 2.0 to 2.9. 
 
     
     
       16. The cellulose resin composition according to  claim 1 , wherein the cellulose derivative (A) is a cellulose acetate propionate. 
     
     
       17. The cellulose resin composition according to  claim 1 , wherein the cellulose derivative (A) is a cellulose acetate propionate,
 a degree of substitution of acetyl group is in a range of 0.05 to 0.5, and 
 a degree of substitution of propionyl group is in a range of 2.0 to 2.9. 
 
     
     
       18. The cellulose resin composition according to  claim 1 , wherein the aliphatic polyester has a weight average molecular weight of 110,000 in terms of standard polystyrene. 
     
     
       19. The cellulose resin composition according to  claim 1 , wherein the hydroxy group remaining degree is 0.01 or more. 
     
     
       20. The cellulose resin composition according to  claim 1 , wherein the hydroxy group remaining degree is 0.1 or more. 
     
     
       21. A cellulose resin composition, comprising:
 a cellulose derivative (A), 
 a lubricant (B), and 
 a plasticizing component (C), 
 wherein the cellulose derivative (A) is an acylated cellulose obtained by substituting at least a part of hydrogen atoms of hydroxy groups of a cellulose with an acyl group having 2 to 4 carbon atoms and remaining hydrogen atoms of the hydroxy groups of the cellulose are unsubstituted, 
 a content of the lubricant (B) is in a range of 0.1 to 10% by mass, 
 the plasticizing component (C) comprises an aliphatic adipic acid ester, 
 a content of the aliphatic adipic acid ester is in a range of 5.0 parts by mass with respect to 94.0 parts by mass of the cellulose derivative (A) to 15 parts by mass with respect to 100 parts by mass of the cellulose derivative (A). 
 
     
     
       22. The cellulose resin composition according to  claim 21 , wherein the total amount of the cellulose derivative (A), the lubricant (B), and the plasticizing component (C) is in a range of 90 to 100% by mass with respect to the entire cellulose resin composition. 
     
     
       23. The cellulose resin composition according to  claim 21 , wherein all resin component contained in the cellulose resin composition consists of the cellulose derivative (A). 
     
     
       24. The cellulose resin composition according to  claim 21 , wherein a content ratio of the aliphatic adipic acid ester is at least 7.5 parts by mass with respect to 91.5 parts by mass of the cellulose derivative (A). 
     
     
       25. The cellulose resin composition according to  claim 21 , wherein a content ratio of the aliphatic adipic acid ester is at least 10.0 parts by mass with respect to 89.0 parts by mass of the cellulose derivative (A). 
     
     
       26. The cellulose resin composition according to  claim 21 , wherein the lubricant (B) is at least one selected from the group consisting of a fatty acid metal salt, a fatty acid amide lubricant, an aliphatic urea compound, a silicone-based lubricant, and a fatty acid ester lubricant. 
     
     
       27. The cellulose resin composition according to  claim 21 , wherein the lubricant (B) is at least one fatty acid metal salt selected from the group consisting of calcium stearate, zinc stearate, magnesium stearate, aluminum monostearate, aluminum distearate, aluminum tristearate, and zinc laurate. 
     
     
       28. The cellulose resin composition according to  claim 27 , wherein the fatty acid metal salt is calcium stearate. 
     
     
       29. The cellulose resin composition according to  claim 21 , wherein the lubricant (B) comprises a fatty acid metal salt, and a content of the fatty acid metal salt is in a range of 0.5 to 6% by mass. 
     
     
       30. The cellulose resin composition according to  claim 21 , wherein in the cellulose derivative (A), a degree of substitution of the acyl group is 2.0 or more. 
     
     
       31. The cellulose resin composition according to  claim 21 , wherein the cellulose derivative (A) has at least propionyl group as the acyl group, and a degree of substitution of the propionyl group is 2.0 or more. 
     
     
       32. The cellulose resin composition according to  claim 21 , further comprising a colorant. 
     
     
       33. The cellulose resin composition according to  claim 32 , wherein the colorant comprises a carbon black, and a content of the carbon black is in a range of 0.05 to 5% by mass. 
     
     
       34. The cellulose resin composition according to  claim 32 , wherein the colorant comprises a carbon black, and a content of the carbon black is in a range of 0.05 to 0.3% by mass. 
     
     
       35. A molded body comprising the cellulose resin composition according to  claim 15 . 
     
     
       36. A product comprising the molded body according to  claim 34 . 
     
     
       37. The cellulose resin composition according to  claim 21 , wherein the cellulose derivative (A) comprises acetyl group and propionyl group as the acyl group,
 a degree of substitution of acetyl group is in a range of 0.05 to 0.5, and 
 a degree of substitution of propionyl group is in a range of 2.0 to 2.9. 
 
     
     
       38. The cellulose resin composition according to  claim 21 , wherein the cellulose derivative (A) is a cellulose acetate propionate. 
     
     
       39. The cellulose resin composition according to  claim 21 , wherein the cellulose derivative (A) is a cellulose acetate propionate,
 a degree of substitution of acetyl group is in a range of 0.05 to 0.5, and 
 a degree of substitution of propionyl group is in a range of 2.0 to 2.9. 
 
     
     
       40. The cellulose resin composition according to  claim 21 , wherein the hydroxy group remaining degree is 0.01 or more. 
     
     
       41. The cellulose resin composition according to  claim 21 , wherein the hydroxy group remaining degree is 0.1 or more.